6 - 6A 单元

A heart attack, also known as a myocardial infarction, occurs when the blood flow to a part of the heart muscle is blocked for an extended period, causing damage or death to the heart tissue. This blockage is typically caused by a buildup of fatty substances in the coronary arteries, which can burst and form a blood clot. Symptoms of a heart attack include chest pain or discomfort, shortness of breath, nausea, lightheadedness, and pain or discomfort in the arms, back, neck, or jaw. Immediate medical attention is crucial to restore blood flow and minimize heart damage. Treatment may involve medications, lifestyle changes, and procedures such as angioplasty or surgery to improve blood flow to the heart.

A symptom is a physical or mental feature that indicates the presence of a disease or health condition. Symptoms can vary widely depending on the specific condition but often include things like pain, fatigue, fever, coughing, and changes in mood or behavior. They serve as signals that something may be wrong in the body and can help healthcare providers diagnose and treat illnesses. Identifying and understanding symptoms is essential for effectively managing health and receiving appropriate medical care when needed.